Improvement in carving-machines



H. GRUBENBEGHER.

Carving Machines.

Patentd April 15,, 1873..

AM. PHOTO-UTHOGRAIHIC 00. m4 (osamns moms) UNITED STATES PATENT OFFICE.

HENRY GRUBE'NBEOHER, OF NEW YORK, N. Y.

IMPROVEMENT IN CARVlNG-MACHINES.

Specification forming part of Letters Patent No. 137,837, dated April15, 1873; application filed October 26, 1872.

To all whom it may concern:

Be it known that I, HENRY GRUBENBEGH- ER, of the city, county, and Stateof New York, have invented an Improvement in OarvingMachines, of whichthe following is a specification:

Figure 1 represents a side elevation of my improved carving-machine.Fig. 2 is a top view of the same. Fig. 3 is a detail vertical section onthe line 0 c, Fig. 2; Fig. 4, a top View of the frame for holdingpattern and block in position for turning; and Fig. 5 a transversesection on the line 70 70, Fig. 4:.

Similar letters of reference indicate corresponding parts.

The invention consists in the improvement of carving-machines, ashereinafter described and pointed out in the claim.

In the accompanying drawing, the letter A represents the supportingframe or table. The same furnishes bearings e for the spindle B of thecutting-tool a, and bearings f for the gage-pin b, and also a support,d, for the sliding carriage G, to which the jointed block andpattern-holding frame D are attached. The spindle B is revolved, by beltor other connection, with a suitable driving-shaft, I. The tool a can beapplied to and removed from the spindle, sothat it may be replaced whendesired. The gage-pin b is fastened in the support f, which is laterallyadjustable on the table A by having its shank enter a sort of sleeve, 9,that is fixed to the table, or by slotting the shank and connecting itby a screw to the table, or by slotting the table, or otherwise. By thisadjustability of the support f the pin 1) can be set at any suitabledistance from the tool or, according to the dimensions of the articlesto be cut. The pin 1) can also be longitudinally adjusted in the supportf, so that its point can be set and held exactly in line with the pointof the tool. The slide 0 is by preference dovetailed in the support d,so that it can move back and forth, but not sidewise, nor up and. down.To its front end is secured a cross-arm, h, which has projecting cars atthe ends, wherein the ends of a rockshaft, 'i, are pivoted, as shown inFig. 2. Rods j j, which are pivoted to the shaft i, connect the samewith a parallel bar, I, and constitute together therewith the joint edframe D, which is a changeable parallelo- The block E to be carved, andthe pattern F to be imitated, are fastened to the faceof a plate, G,which has ears m m at its ends, which are pivoted to the ends of the barI. The plate G can, on its points n a, be swung to hold the block andpattern at any suitable angle to the tool and gage-pin, and can, by aset-screw, 0, or otherwise, be locked at any desired angle to the bar Z.The whole frame can moreover be vibrated on the pivots p p of therock-shaft i, so that the block and pattern can be swung on twodifferent curves, both indicated by dotted lines in Fig. 1. A spring orweight, r, connects with the slide D, and tends to draw it back, awayfrom the tool a and pin 1). Another spring or weight, 8, serves tobalance the frame D, and to hold it nearly horizontal.

The operator, after the block and pattern have been properly secured tothe plate G, and the tool a and pin 12 being adjusted, has only tovibrate the plate G up and down, and draw it back and forth, and swingit sidewise on the pivots of the rod j, so as to bring every part of thepattern in contact with the pin 1), which will cause the tool .to reachcorresponding depths and parts of the block, and to reproduce thepattern. When work is to be cut on more than one side-i. 6., when itbecomes necessary to turn the pattern, in order to bring all parts ofits surface in contact with the pin b-I employ the holder which isrepresented in Figs.4 and 5, and in which laterally adjustable bracketst, a, and 'u, are fastened to the face of the plate G. These bracketscontain center-pins w to, all in line with each other. The block to becut is centered between the brackets t and a, and the pattern betweenthe brackets to and o. The center pin in the middle bracket to hasflattened ends and is swiveled in a, so that when the pattern is turnedthe block will also be turned in the same manner and degree by Virtue ofsuch swivel-connection.

Having thus described my invention, Iclaim as new and desire to secureby Letters Patent-= l. The plate G that holds the block and patterncombined with. a jointed frame, I),

balanced in a horizontal position by weights with the brackets ta 2:,having centering-pins,

or springs, as and for the purpose described. w, of which the middle oneis swiveled, as

2. The combination with plate Gr, supportand for the purpose specified.

ing both block and pattern, of the tool a and HENRY GRUBENBECHER. pin11, operating therewith, as and for the pur- Witnesses: v pose setforth. (J. SEDGWICK,

3. A block and pattern-plate, G, provided T. B. MOSHER.

